Although I have not found any baptism record for John Sutton, I am fairly confident that he was the son of Thomas Sutton.

This 8 day of June in the year 1726 I John Sutton of Winterbourne Gunner in the County of Wilts being very Sick but in Good Sense and Memory do Make and ordain this to Be My Last Will and Testament in Manner and for following

John Sutton was the son of John and Mary Sutton. He was baptised on 10^th July 1723 at Winterbourne Gunner

This is the last Will and testament of me John Sutton of Winterborn Gunner in the County of Wilts Carpenter made and published this Twenty Sixth day of August 1754 in manner following (that is to say)

This is the last Will and Testament of me **John Sutton** of Winterbourne Gunnor in the County of Wilts, Carpenter made and published the twenty second Day of December in the year of our Lord One thousand seven hundred and Eighty eight.